It’s All about Water
If you have running water and flushing toilets, it’s because your house is connected to a sewer system. This means that water from a reservoir or lake flows through pipes into your home, and dirty water gets pumped away again through sewer pipes to be cleaned in a water treatment plant. Or perhaps your house draws water from a well, and dirty water flows into an underground tank called a septic system. Either way, it takes water.
Even 5,000 years ago, people understood how useful water could be to carry away waste. They built pipes to bring water from rivers and lakes, or from tanks that filled up with rainwater. In some villages in ancient Scotland
